And arthur l



G. A. AND A. L. BOBRICK.

LlQumnls'PENsER. APPLICATION FILED JULY I8. 1922.

Ressued Sept. 12, 1922.

G. A. AND A. L. BBMCK.

L|Qu|n DISPENSER.

APPLICATION HLE JULY la, 1922. Bessued Sept. 12, 1922. 15,450.

ZSHEETS-SHEET 2.

`45 may be regulated 'as desired; to i i leakage from the discharge nozzes' so that Reissuel Sept, l2, 1922.

UNITED `STATES- R,1s,4so

PATENT OFFICE.

' GABRIEL A. noBnIcK, or Los ANGELES, CALIFORNIA, ANI) AB'IIIUB L.BOBRICK, 0F

NEW YORK, N. Y. f

LIQUID DISPENSER.

original No 1,364,347, dated ianuary 4, 1921,`seria1 No. 73,1114, meaFebruary 17, 1am. Application for reissue filed July 18,` 1922. SerialNo. 575,820. 1

To alf/whom 'it may concern.'

Be it known that we, GABRIEL A. BoIsnIcK and ARTIIUI: L. BoRIoK,citizens of the United' States of America, and residents of 5 LosAngeles, county of Los Angeles, and

State of California, and of New York, in the county. of New York 'andState of New York, respectively, have invented a new and I useful LiquidDispenser, of which the following .is a specification.

This` invention relates to apparatus for dispensing measured or lpredetermined quantities'of liquid, andparticularly to means formeasuring or predetermini'ng. the

quantity tol be dispensed, and dispensingA or discharging the same, by.means of the force exerted by a-piston or plunger. y,

The invention is particularly adapted for v dispensing liquid soap -inpublic lavatories such as the lavatories of sleeping cars, clubs, hotelsand the like, where from a single or `common reservoir a number ofdispensing devices are to be supplied either-by gravity or pressure andwhere the tubes or channelsl connecting the reservoir with thedispensers are extended horizontally as well as vertically or bent incurves whereby 'the' liquid 1 is re uired to ow from the reservoir tovthe ispensers not simpvly vertically but horizontally and, in manycases, down and' up again or vice versa An object of the invention 1s toconstruct a liquid dispenser which will prevent the entrance of air intothe tubes supplying the fliquid to the dispenser.

Other objects are Vto provide such a construction and interrelation ofparts as to positively measure or determine the quan- 4 tity of liquiddispensed by each operation of a plunger or piston; to prevent acontinuous flowy of liquid when the dispenser operation; to provide sucha construction and dischargeperV stroke of piston or plunger the liquidis discharged only in the predeterfv mined. quantity and at thepredetermined time and there is no drip `or Waste of the liquid.

- A further object is to providesuch vinterrelation of parts as shall beextremely sim'- revent allV ticularly pointed out in the claims and willf be more readily understood by reference to the accompanying drawings,forming a part of this specification, and in which:

' Figure `-l is a vertical sectional view of a lavatory, of a sleepingcar, yhaving installed therein a reservoir and dispensers embodying ourinvention; l v

Fig. 2 is a longitudinal sectional view of ,a dispensing deviceembodying our invention the Same being shown in normal or closedposition;

Fig. 3 is a similarview of a slightly modified Itorm; Q

Fig. 4 is a similar view ofthe construction shown ,in Fig. 2 of thedevices in operatedy position;y

Fig. 5fis a similar view of the construction shown'in Fig. 3 the partsbeing in operated' fposition; .y

Figs. 6 and 7 are similar views or another slightly modified form;vv

Figs. 8 and 9 are similar views of a fur-- ther modified form ofdispenser embodying our invention. g

In Fig. 1 of the drawin we have shown orfindicated a liquid supp yreservoir "l havling a maintube 2 leadlng therefrom which ably providedwith an opening by which it interrel'ation of parts that the quantityof' 'means, such as a Vshoulder 12, threadedfporpiston rod, so as toform'an Ainterposed between the shoulder 12 and the' top of the plate 15and a washer 17 between 'the nut 14L andV the bottom ofthe 'plate 15.

One or both of said washers may be of the well known split or lock nuttype which when tightened will holdthe body 11 securely ,in its setposition. lThe body 11 is provided with two connecting axially arrangedbores 18 and 19 of different diameters,

' adapted to accommodate the operating parts or mechanism ofthecdispenser.

A plunger or piston 2() is mountedin the bore, the piston portion beingof 'such diame ter as to make a close working tit in the bore 18 ot' thebody 11. The upper portion of the pistou 20 is slightly reduced indiameter, as shown, to form the hub 24, thereby leaving an annular spaceor chamber 25 between such hub and the wall of the bore 18. The end orupper edgeof the hub 24 is adapted to abut against the wall 2G of thebore 18 and act as a valve for normally closing communication betweenthe space or chamber 25 and the bore 19to avoid all possibility ofleakage in case the working fit of the piston is not suiiiciently'close. In the event7 however, that the piston fit is suiiiciently closeand under some circumstances it is merely necessary that such end orupper edge of the hub '24 act as a stop to arrest the outward movementofthe piston which function it performs in any event. 27 represents a-nup-A ward extension of the piston 2() forming a stem or pistonrod ofsmaller diameter than the main piston 20. This piston. rod `or stem i 27extends through the bore 19 to the outside of the body 11. The' portion28 of the piston rod or stem 27 which connects with' the hub 24 of thepiston 20 is recessed or made of smaller liameter than the tupper end ofthe annular space or chamber 29 between the stem 27 and the wall of thebore 19.

As shown the piston 20 is hollow and a portion of its bore 21 iscontracted to form toward the upper portion of the piston the channel 33which also extends within the rev lduced or stem portionf27. `The nozzle32 is preferably vformed separate vfrom the body 11 and provided with athreaded end to screw into the opening 30. The nozzle 32 is providedwith a duct or passage 31 and through the opening 30 communicates .into

'the small bore 29. Near the upper endof the channel 33 one or moreports 34 open into the chamber 29.

Preferably the piston stem -or rod 27 is provided Onitsouter end with asuitable push button or handle and a suitable ,stuling box is formedaboutvthe stem onthe outside of the body 11. This stuffingv box, asshown, consists of a suitable packing 37 (of asbestos or other suitable,material), a gland 38, andan internally .threaded cap 39 engaging theexternal thread of .the end ofthe body 11. This stuingbox is providedprimarily to compensate forV possible wear between the stem 27 andV wallof the bore 19.. y

f The lower or open end of the piston 2O is preferably internallythreadedvto receive a hollow plug or bushing 40.' `The top. of this plug40 forms a seat for thevalve 22. The valve 22 is norinally'held on itsseat bythe spring 23. The tension ot' the spring 23 should be such as tohold the valve 22 'seated against the normal pressure`J of liquidbetween the reservoir andl the dispenser. This plug extends asuitable'distance bc.- low the end of the pistou 20 to form a suit ablesupport for the coiled spring I50, to prevent itslateral`play.v

The lower end of the bore 18 `is threaded to receive a valvecage orhol'low` plug' 43 in the valvechamber 44 of which the valve 45 operates.The bottom wall of the chamber 44 is suitably shaped to 'form 'a seat 46for'thc valve 45. A port 47 communicates up through the valvesseat 46into the chamber 44. 48 represents a hollow anged cap, theY fiange ofwhich extends between the upper end of the plug 43 and the overhanging`edge of the wall oil the bore 18:. -This hanged cap is preferablyextended up into.

the bore 18 to form a suitable support for the lower end of the spring50. lrepresentsa threaded opening into "the chamber 18. By removing thethreaded plug -52 the air may be expelled from the tubes 3 and 4 andfrom the lower portion of the dispenser and replaced with liquid, -whenthe apparatus is first connected up and the reservoir 1 tilled'withliquid.

In rder to regulate or adjust the stroke 4of the piston 2() the routerend of the stem 27 .is suitably threaded and a regulating nut 55 and alock nut 55' provided. By adjusting the position -of the regulating'nuton the stem the strokebr movement of the piston isfadjusted as the innerface of this adjusting nut will contact with the outer face of the ca-p`39 ofthe 4stuffing box 'when ton. .ingl accessible and sensitive so that'very thread'e y from the supply tubes 3, 4 an to lill the A persondesir-- thel channel of the nozzle` and' the slpace 'between the end ofthe. l. of the chamber, andl t `space 29 and the channel 31' of thenozzle y commencement 'of I4,8r andgthat the moment of the piston isstopped this pressure is re- "through the nozzle.

ducin-` the quantity discharged by the pishis regulating mechanism isexceedquic and close .adjustment or regulating can be secured. It isimportant that the thread on the stem 27 should not extend to anyportion of thestem whichworks into or through the stuilin box. e

The operation oft e dispenser of, Figs. 2 and 4 is as lfollows:l IWhenthe dispenser is rst set up in osition and the" reservoir 1 is filledwith l'qiiiid soap` Ithe threaded plug is tpartly or w olly removed fromthe perforation 51 to ex el the air interior ywith iquid soap. ing asuppl; of liquid soap presses against the button 5 with onel hand andholds the other hand' with the elm up, under the outlet of the nozzle.

e piston on its in- Ward strok'elcompresses the liquid in the receivingchamber 18 which closes the foot valve 45,10 ens the delive .valve 22land the li uid ows through the channe 331into the 'annular'space 29,llling above the end of the piston. Upon re ease ofthe pressureon thepush button the tension of the spring forcesthe piston outward.Themovement of the piston outward forces the 'li charge chamber 25formed in thebore 18 piston and the walls rough the annular 32, theyvalve 22.having closed u `on1- the this stroke and being held in itsseatby the spri 23.

It will be observed tlgat .this form of'` dispenser yis double acting inthat it delivers l'the predetermined "f quantity of liquid on inward andon each outward stroke of each the piston. The valve 22 can remain .openonly. durin 'such time as the piston in its inward stro e exerts ressureon the liquid in `the receiving cham 18 between the and lug 40 and plugof the piston proper 20,

e inward motion lieved land the spring 28 seats the valve 22 andnoliquid can then ow from the source of suppl through' the nozzle of thedisenser'w en the piston is at rest and the ispenser can discharge` onlya'fineasured or ypredetermined `qiiantitiy of liquid upon each'stroke ofthe piston.` t is to be observed thatl no' air can be drawn into theoperating u mechanism of the dispenser during the injward .strokeof thepiston because all the channels and chiimbers are at all times full y,of liquid'and the Iiston on its inward stroke `forcesv the liquid intoall such chambers. and

channels to replace the liquid discharged All possibility of the that inFigs. 2 and 4 except that ythe u chamber 21,l

quid out from the dis-` .pelli `11, agg shown in Fi .sda 0 0 8 dispenserbecoming air bound thereby avoided. Y

\In the modified form yof dispenser shown in Figs. 3 and 5, the body 111s the same as per portion of the bore 18 adjacent the wa 126 isrecessed to receive a may be a washer made of rubber or any othersuitable material. Instead of recessing the stem 27, as shown in Figs. 21 and 4, the stem is of the same diameter and the bore 19 is enlargedtoa point slightly above the opening into which the nozz e 32 extends sothatthe chamber 29 is formed by the increased size of the bore 19. Thepiston 20 is preferably of the same outside diameter, throughout 'itslength and of slightly less diameter than the diameter of the bore 18 soasto rovide the annular space or chamber 25 or practically the fulllength ofr the piston proper. A series of ports 56y connect the pistonchamber 21 directly with the chamber 25. A cap 60 suitably shaped totthe ball vvalve 22 is preferably provided with 'a hub 61 to form asupport for A 23'and a rod Kin this case is closed at its tog, the portsof the form of Figs. 2 and 4 The valve 22, cap 60 vhub 61 stem 62 may,if desire all be formed in one piece. The plug 4071s provided with anextension or flange 63 shaped to accommodate a packing or cup 64 made ofleather or any suitable materiaL The plug 40 when screwed into thechamber 21 holds the packing or cup 64 in position and forms ano r-`ative portion of the Eiston the cup 64 av' ing a. close workin t withthewall lof the bore 18. The supp y tube 4 is connected to ing omitted. androd or the dispenser by means of a union 7 comrising a tubular body65'irovided with a ange 66 and a nut 67. 'rubber washer 58 maybeinterposed between the bodies 11 and 65 to make a tight joint. Thethreaded opening 51 and the ca screwy 52 for exthe air may be ocated'inAthe body g. 2 or in the cylindrical body 65, as shown'in Fig. 3.

The operation of the dispenser of Figs. 3 and 5 is the same as that ofFi 2` and 4, except that on the inward lstro e o'f the piston the liquidpasses lfrom the chamber 2l` into the annular space .or chamber r25.

iis

With the construction of Figsr and 5 the hub 24 acts 'as anauxiliaryvalve to prevent `leakage from the nozzle when the 'dispenser is not inuse, should any liquid the space between the )piston an pass-throughfthe wall of should the spring 23 fail to properly close thevalve 22.

In Figs. 6 and 7 we have shown a horizontal type ofdispenserhparticularly adapted for attachment above the wash basin in aposit-ion parallel or nearly vso with thetopof the basin. yWith such adispenser the i main supply tube may follow alongside or I form a seatfor the valve 45.

within the wall either above or belowv the basin. l

In this embodiment of our invention the tubular body 11 is provided withan extension 70, having within its. walls Va 'chamber 71 from thebottomof which the valve chamber 44 and a channel 72 extend downwardly,the latter connecting with the receiving `chamber 18. An extension 73,provided with a bore 74 projects from the extension and is adapted to besecured tothe supply tube by suitable means. The bottom `of the valvechamber 44 -is suitably shaped to The valve opening 75 connectsfthevalve chamber 44 and the channel 7 6 which'in turn leadsto the bore 74.Communication is thus 'established between` the source of liquid supplyandthe receiving chamber 1'8 'of the vdispenser through the bore 74,channel 76, inlet l75, valve chamber 44, 'chamber 71 and channel 72,when the valve 45 raisedl from its seat by the gravity o r pressure ofthe liquid in the supplyfreservoir. Preferably thec'hamber 71 is closedby a removable cap 77. ByV

wholly ory partially removing this cap 77 the air from the tubes 3, 4may be expelled` This cap 77 corresponds in this function to the plug520i Figs. 2'and 4. A plug78 closes the open end vof the receivingchamber 18. The piston 20 and vthe piston rod 27 may be'either of theforms shown in Fig, 2 or Fig. 3.`

The delivery mechanism comprises the' valve 79, preferably provided witha hub 61 and two rods 80, 80 which serve as guides for the ,valve 79.y Abushing'Sl 1s screwed into the end of the piston or plunger 20.

The inner end of this bushing`81 serves as a valve seat.r A washer-82may be interposed between the valve y79 andthis valve seat. 4 plug83yisscrewed into th'ebushing 81 and is so formved oli-its outside as to ac.

commodate the 'packing or cup 64 jand is also providedwith a channel 84and with one or more 'perforatins or ports 85 in its side wall. and withaperforation 86in its end wall.y This prforation'S is of a diam-- eterslightly greater thanthat ofthe guiding rod 80' to serve-as a guidingchannelfor the rod 80. The 'channel 33 serves as a guidefo'r the rod 80.The valve 79 1s thus held in axial position in relationlfto-,fthe 6chamber 21- and the valvemseat -82 zwhen.; openlngor closing. Theperforationsor.

ports serve as passages for the ,liquid from the receiving chamber 18into the pis:-

ton chamber 21 when the valve 79 is raised!y vby the compressed vliquid0n the ;inw.ard;`

the' charges of liquid. soap. A 4In the modified form of dispensing;deviceV shown in Figs. 8 and 9 the foot valve is omitted and provisionisl made for opening, the discharge Valve79, in the vpiston 20, bypositive action instead of by the compression of the liquid in thereceiving chamber bythe force. of the piston -on its inward stroke, as.1n the construction illustrated in Figs. 2 to For this .purpose :theopenend of the' receiving chamber 18 is closed with a vplug 87, providedwith: a channel-88, the innerA 1 end of which is closed to form .ananvilor stop 89. The diameter of the .inner lend of the plug 87 is contractednto -form'a hub 9 0,

and one 0 1' moreV perforationsa'or portsf91,

connect the channel 88 with the Areceiving chamberr 18. When the-valve179 is seated loo the guidingrod 80 extends outside the'plug 83about half way betwpen fthe, toptof the anvil 89 and the Abottom ofsaid'plng 83.

Thepiston rod-27 is presided with .a ref .f t

cess 92 to form an annular=space or chamber between the recessedportionxofthe piston lrod and the wall of the bore 19.

.. The operation is as follows: The person desiring a supply of liquidsoap pushes, the

push button lnwardly thus forcing thefpiston inwardly until the end-oftheguiding rod 80' reachesthe anvil 89; the; further ad vVance ofthepiston, with the rod 80 resting on. the anvil, holds the valve 79stationary 4and the .further inward 4movement of the piston thus opensthe valve 479. -Thepressure'of the columnof liquid fromthereservoirbeing direct-td the liquid in the chamber 18 such liquidfiowsfinto the piston chamber `21 anida-into the space above the piston,vacated'by the piston. `hen the pressure of the push buttonAisreleased'andthe piston bythe tensionV ofthe Springispushedoutwardly-the valve 79.1iemai'ns open u ntll. lthe piston hasreach'edapoint aty whichA the' rod 80 will lift vitself from the anvil.. The

liquid entrappedinthe chamber above the` Vpiston Iwill be forced outthrough the nozzle means carried byI said by the further advance of thepiston: To prevent a continuous flow of the liquid from the nozzle4vwhen the-)valve 79 is open the distance of the extensionl of the guidingrod 80 outside., the lug 83 and the length of the recess 92 in t episton rod are so gaged that the moment the guiding rod 80 reaches the`anvil the end 93 ofthe recesszcloses the outlet 31. It is understoodthataboutlhal `of the motion ofthe piston on itsinward stroke and about`halfof its motion on the outward stroke are lost. l l A Withthefconstruction shown in Figs. 2

and 4, the -va'lve hub 24, when'seated against lthe wall 26, prevents'possibility of the liquid dripplngfrom the dispenser due to leakagebetween the piston and the wall of the hollow body 11. In this form thevalve 22 is depended upon to shut of the main supply from the outlet. Inthe forms illustrated in-Figs. 3, 5, 6, 7, 8 and 9, this hub portion orvalve 24 positively prevents all` passage of the liquid out of thedispenser when the piston is in its outward or closed 'tion'. lIt isthus obvious that by means o this'hub or-valve 24 formed on the endof-the piston, provision is made against any wear of the surface of thepiston or` of the packing or piston head 64,

and it is not necessary that these parte should fit with such extremeAnicety as wou-ld 'be otherwise required in order to prevent eitherleakage or drippage.` It is also obvious 'that not only does the spring50 exert its tension to ,hold this valve or hub 24 in contact with thewall 26 orwith the linterposed washer or packing 58, but

that the. pressureA of theliqud from Athe reservoir also assists inholding this valve closed on its seat.

Weclaim: v 1. .A liquid dispenser comprising a reservoir 4and" a `hollowbody connected thereto' and having 11a hollow piston, acharge-receivingfchamberforme'd at one end of said piston, a dischargechamber formed' at the other end'=thereof`,"a passage through saidpiston connectingfsaid chambers, a valve` controlling the passage. fromsaid reservoir to said receiving.chamber, a valve controllin saidpassage-through said piston, an ou et vfrom 'said discharge chamber, andn iston for closing communicationV from said ,discharge chamber to saideoutlet`when the piston is in its outward positionfe 2.,.A liquid. dicomprising alreservoir and a hollow body connected thereto having areceiving chamber and a discharge chamber, a valve within Athe receivingchamber to close the inlet passage thereof against thev liquidvbacklngout therefrom, a spring-returned reciprocating piston, a

assage in said piston between said 'cham- `t5 rs, a valve automaticallyclosing said last-named passage'p'on the return stroke l of said'piston,"and an outlet fromsaid discharge chamber, said `piston provided withmeans-for closin communication between said discharge v c agnber andsaid outlet when said piston is in retracted position.

, 3. In combination in fa hollow body provided with an inlet andanoutlet and with -liqnid receiving chamber formed between sa1d inlet andthe inner end of said piston, a. ,discharge chamber formed between theupper portion of said piston and the inner wall o the body, a valvewithin said pist0n,'a valve-stem therefor for centering the valve, and'aspring surrounding said valvei stem and exerting its tension to seatsaid valve upon the walls of the passage through said iston. I

4L n combination a hollow body providedwith an inlet and an outlet andwith a piston-stem bore, a hollow piston having its stemextending-through and out from said bore, a valve within said bodyadapted to close said inlet upon the inward stroke f said piston, aspring for normalizing said piston, a liquid receiving chamber formedbetween said valve and the end of said piston, a discharge chamberformed between the upper portion of said pistonv and the inner wall ofthe body, a valve within 'said `piston adapted to close the passagethrough said piston from said receiving` to said 11scharge chamber,aportion `of the upiston-- stem being hollowed out to vform a channel, avalve-stem extending within the passage so,A

ofV said piston and into said piston-stem channel, and aA springsurrounding said valve-.stem and exerting its tension to seat said valveto close'sai'd piston passagew, y

5. In combination a hollow: body having an inlet and an outlet and apiston` stem bore, a hollow piston open at one end and having a stemextending through said bore and outside said body, a chamber bemgfoi'med between the surface of saidA piston and the'wall of said-bodyabout ythe u per portion offsaid piston, a port leading rom the chamberof said piston near-the stem end thereof, 'a hollow plug partially,closlng the inner end fsaid piston, a sprung-actuated valve in saidpiston, a second chamber n formed belowsaid plug, and w a sprlngmountedin 'said' second chamber adapted to exert its tension to forcesaid piston .outwardl f 6. l combination a hollow body having an inletand an outlet and, a piston stem bore, a hollow piston open at one endand Vhavmounted in the bore of saidl mounted in-'the open end of saidpiston and interposed between the lower endo sai f ing :a stem extendingthrough said bore and outside said .bod ,ia chamber being formed betweenthe sur ace of said piston and the wallv of'said body about the upperportion of said piston, a port leading from the chamber of said pistonnear the stem end thereof, a Vhollow plug partially closing the innerend of said piston, a spring-actuated valve in said piston, a secondchamber formed below said plug, a spring mounted in said second chamberadapted to exert its tension to orcesaid piston outwardly, and avalve-arranged to close said inlet-upon the inward stroke of-saidpiston.

7 The combination'with a body having an open ended bore,vthe outerportion of the bore reduced in diameter, of a piston mounted in saidbore and having a. longitudinal bore open at one end and a stemextending into and'tlirough said smaller bore andv out beyond `said bodyto form an operating means, an annular channel formed between the wallof such smaller bore and the inner portion of' such stem, a 4portconnecting the bore of said piston to said annular channel, avspring-actuated valve piston, a plug forming `a seat for said valve,mounted in the open yend of-said bodyzand having an inletv passage, avalve arranged to close said inlet-.passage on the inward i stroke o fthe piston, -and a spring interposed between the-lower-end of saidpiston and' said last-named plug and arranged to exert its tension-tomove' said piston vto its outer osition.

`8. he combination with a bod having a central bore'of two diameters,ofY a piston having a longitudinal bore open at one end anda stemextendin `into and through'the smaller bore of sai Vbody andoutbeyond.,l said body, a 'port' connecting the bore of said piston to-thebore of said body .toward the Vupper -,end of said piston, a ackingagainst which the u peri-end of sai piston seats, a plug mounte in theopen end of said piston and forming a valve seat, a -valve and' valvestem in said piston, -a spring surrounding said -valve stefrh 'andexerting its tension to holdsaid valve seated on said plug, a plugmountedin the open end of saidbody -and Vprovided with' an inletpassage, a valve larran ed to close-.said inlet passage on theinwarifstroke of". the piston, a s rin a plug piston andv said-last-named plug and;l arrangedto exert itsgtension to .movefsaidpiston-to its outer position..

9. A liquid daispenser'comprising 'asource of supply ada ted lto furnish-liquid under pressure, a ho low body connectedthereto and provided withan outlet, avpist'on in said hollowbody separating said hollow bodyinto-.a receiving chamber and-a 4dising chamber `,formed Vunderpressure, V

charge chamber, the end of said piston forming a valve to chamber whenofits outward stroke,

a valved lpassage between said receiving and discharge chambers, andmeans for reciprocating said piston.

positively close the discharge the piston moves to the end 10. A liquiddispenser comprising a res- Y ervoir ada ted to supply liquid under.pressure, a ho low body connected Athereto and provided with an`outlet, a reciprocating piston, said hollow body provided with a V fromand connected thereto for dispensing vmeasured charges of liquid, 'anopening 1n said'means whereby the air in said dispenser' may be expelledwhen the same islilled `with liquid, and means for closing such opening.Y .v I.

12. liquid dispenser -having a reservoir, a hollow body'connectedthereto and having a hollow'piston, a charge receiving chamber formed atone end of said piston, a valve to close the passage from said reservoirinto said receiving chamber, a discharge chamber formed at the otherend=of said piston, a valve vcontrolling the passage between saidchambers, and a valve seat ins-said-hollow body on which the end of saidpiston seats at the movement.' v

q13. A liquid dispenser comprising-.a reservoir and a hollowbody'connected thereto and having a hollow piston, a charge receiv- ,atone=end of said piston, a vdischarge chamber -formed at the other endthereof, a passage through said,

termination yof its voutward Apiston, connecting said chambers, a valvecontrolling the passage from said reservoir to said receiving chamber,avalve controllin" said passage through sa'id piston, an out et fromsaidv discharge chamber, said piston arranged to engage a wall of saidment of said piston on its outward stroke.

source of supply adapted-to ffurnishliquid a hollow tbody connectedthereto 'provided hollow bodyl into a receiving chamber and a dischargechamber, the end of said piston-forming a stop to positively limit theextent of receiving chamber,

jervir and means located at a distance therev so,

,discharge chamber .for arrestingjhe movewith an outlet, a iston insaid' hollow rbody 4separating sai outward movement of the piston, avalved passage between said receiving and discharge chambers, and meansfor reciprocating said piston. 15. Ina liquid outlet, a hollow piston,having an inlet and an outlet, and slidably mounted in'said hollow body,a iston stem. extending outside l the body an adapted to operate saidis"- 10 ton, a valve to close the intake to the hol ow body, a. valveadapted to close the inlet into dispenser the combination of a hollowbody hav'ngan inlet and' an" said hollow piston, seat in the hollow bodyagainst `which the pistonzcomes to rest, and a sp'rngj in said hollowbod adapted to force the piston outwardly an to hold it in 15 normalposition when the iston is at rest.

Signed at Washington, C., this 29th GABRIEL A. BOBRICK. Signed at NewYork, N, Y., this 7th .day of July, 1922.

ARTHUR L. BOBRICK.

'day of June, 1922.

